Walrus Pump TQCN1500, Instruction Manual

TQCN Series Instruction Manual

Before beginning installation procedures, these 
installation and operating instructions should be 
read carefully. 

I. Applications:

This TQCN Series are designed for hot water 
supply (up to +90°C) and pressure boosting in 
residential and commercial applications.
They are suitable for solar energy hot water 
system or other types of hot water systems.

II. Operating conditions:

1. Ambient temperature: Max. +40°C 
2. Liquid temperature: +4°C ~ +90°C
3. Relief pressure value automatically :  5kg/cm²
4. Relative humidity: Max. 85% (RH)

III. Installation

1.The pump foundation should be rigid enough 

to absorb any vibration from the motor, and 
the pump should be securely bolted to the 
foundation. 

2. It is recommended that the plumber/installer 

provides an adequate draining system to 
avoid damage in case of leakage, particu-
larly when installed indoors. When it is 
installed outside, it should be covered by a 
weather-proof housing, well ventilated to 
allow motor heat to escape.

3. The pump should be installed as close as 

possible to the liquid source.

4. When use with water heaters, a check valve 

should be installed between pump 
(discharge) pipeline and water heater 
(suction) to avoid high-pressure steam 
backflow.

5. It is recommended to shut off the pump 

when the liquid source is unavailable; 
although it has the dry run cut off function. 

6. The pump has a built-in check valve. Please 

do not install any other valve on the suction. 

7. TO avoid your furniture damage, do not 

install the pump on ceiling, carpet or any 
place close to electrical appliance, outdoor 
installation must covered by tent.

IV. Piping

1. The suction line should be installed as short 

   and straight as possible, with a minimum of 

bends. The internal diameter of the suction 
pipe must be equal to, or greater than the 
ports of the pump.

2. The connection between the suction line and 

pump must be airtight, and the suction pipe 
must be positioned so it has an upward 
slope to the pump (thus avoiding the 
formation of air pockets).

3. When used on a suction lift, a foot valve 

should be fitted on the suction line, below 
the liquid level. 

4. If hose is used as the suction pipe, it must 

be non-collapsible. 

5. To minimize pressure drop, the discharge 

pipe should be at least the same size as the 
discharge port of the pump. 

6. For long suction pipes or high suction lifts 

over 13 ft, the suction pipe should be of 
greater diameter than the suction port. 

7. Ensure all connections are completely 

sealed using thread tape only. 

V. Electrical connection

This mark located outside the 

connection box is a warning for an 

electrical hazard.

1. Ensure the mains voltage is the same as the 

value shown on the motor plate and that the 
pump is safely connected to ground/earth. 

2. The single phase models are supplied with 

plug and lead and can be connected directly 
to the mains supply. The 3 phase models 
should hook up with a circuit breaker. 

VI. Wiring diagram

WARNING: 

Risk of Electric Shock - This pump is 

supplied with a grounding conductor and 

grounding-type attachment plug. To reduce 

the risk of electric shock, be certain that it 

is connected only to a properly grounded, 

grounding-type receptacle".

Before operation, please ensure the voltage is 
correct and the circuit breaker and grounding 
connectors are all connected in accordance 
with local regulations.

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